Once you have grabbed the victim, now comes the tough part - getting the two of you to shore. If the C-Spine is OK, this is a lot like swimming with a swamped boat except the swimmer isn't as streamlined. If the C-Spine is damaged, you need to take great care to prevent further injury and paralysis. The head needs to be immobilized and you probably don't have that gear with you. The best you can typically do is ensure they are face up and breathing and wait for help from others you are paddling with - do no harm. If you have to swim, make certain others set safety below - boat and safety lines.